proc: uninline proc_create()

Save some code from ~320 invocations all clearing last argument.

	add/remove: 3/0 grow/shrink: 0/158 up/down: 45/-702 (-657)
	function                                     old     new   delta
	proc_create                                    -      17     +17
	__ksymtab_proc_create                          -      16     +16
	__kstrtab_proc_create                          -      12     +12
	yam_init_driver                              301     298      -3

		...

	cifs_proc_init                               249     228     -21
	via_fb_pci_probe                            2304    2280     -24

Link: http://lkml.kernel.org/r/20170819094702.GA27864@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/generic.c

@@ -499,6 +499,14 @@ out:
 }
 EXPORT_SYMBOL(proc_create_data);
  
+struct proc_dir_entry *proc_create(const char *name, umode_t mode,
+				   struct proc_dir_entry *parent,
+				   const struct file_operations *proc_fops)
+{
+	return proc_create_data(name, mode, parent, proc_fops, NULL);
+}
+EXPORT_SYMBOL(proc_create);
+
 void proc_set_size(struct proc_dir_entry *de, loff_t size)
 {
 	de->size = size;

include/linux/proc_fs.h

@@ -28,13 +28,7 @@ extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
 					       const struct file_operations *,
 					       void *);
 
-static inline struct proc_dir_entry *proc_create(
-	const char *name, umode_t mode, struct proc_dir_entry *parent,
-	const struct file_operations *proc_fops)
-{
-	return proc_create_data(name, mode, parent, proc_fops, NULL);
-}
-
+struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct file_operations *proc_fops);
 extern void proc_set_size(struct proc_dir_entry *, loff_t);
 extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
 extern void *PDE_DATA(const struct inode *);